Ok, so your first step would be to set up the equation. It would look like V=lwh. So now you substitute in the numbers. So now you would have 48=2*4*h. You want to isolate the variable, h, in order to solve the problem. So you do the inverse of multiplication which is division. You divide by 2 on both sides. So now your problem looks like 48/2=2/2*4*h. You finish dividing to get the final problem of 24=4*h. Now you would do the same division with the number 4. You would have 24/4=4/4*h. You finish dividing to get 6=h, and that is your answer. Have a good day!